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Taiwan Semiconductor Corporation SMBJ9.0
- Part No.:
- SMBJ9.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9.0.pdf
- Description:
- 600W, 11.1V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,928
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Product details
Overview
SMBJ9.0 from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a 9.0V working stand-off voltage, 10.0–12.2V breakdown voltage at 1mA test current, and 16.9V maximum clamping voltage at 37A peak pulse current. It protects automotive power rails and industrial I/O interfaces against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ9.0 datasheet, SMBJ9.0 pinout, SMBJ9.0 application, or SMBJ9.0 equivalent, this page delivers verified electrical specs, DO-214AA package details, clamping performance under 10/1000µs surge, thermal resistance data, and real-world ESD/inductive switching protection use cases - all confirmed from Taiwan Semiconductor's official R2104 specification.
Technical Context
The SMBJ9.0 employs a glass-passivated silicon junction optimized for fast response (<1.0ps), low leakage (<5µA at 9.0V), and robust energy handling (600W non-repetitive, 10/1000µs). Its unidirectional configuration provides forward conduction only during overvoltage events, with VF = 3.5V at 50A surge.
Thermal design is supported by RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to +150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements in its DO-214AA molded package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR @ IT=1mA | 10.0–12.2 V - Breakdown threshold range ensuring consistent turn-on across production lots |
| VC @ IPP=37A | 16.9 V - Clamped voltage during 10/1000µs surge, limiting downstream IC stress |
| IPP | 37 A - Peak impulse current capability at rated clamping voltage |
| PPK | 600 W - Non-repetitive surge power rating per 10/1000µs waveform |
| ID @ VWM | <5 µA - Low leakage preserves signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables deployment in under-hood automotive and industrial environments |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional TVS diode with cathode band marking. Matte tin-plated leads, RoHS and halogen-free compliant, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to protected circuit ground or low-side return path during clamping |
| Cathode | Reverse-biased terminal | Connected to protected line (e.g., 12V rail); polarity mark indicates cathode end |
Key Features
| Feature | Design Value |
|---|---|
| Clamping voltage stability | 16.9V at 37A ensures predictable overvoltage limiting for 5V/12V logic and power ICs |
| Ultra-fast response | <1.0ps enables suppression of ESD and fast transients before sensitive nodes are stressed |
| Low leakage current | <5µA at 9.0V minimizes standby power loss and avoids false triggering in high-Z monitoring circuits |
| Automated placement compatibility | DO-214AA footprint supports high-speed pick-and-place assembly without lead deformation |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD coupling) |
Applications
| Automotive Power Rail Protection | Industrial I/O Interface Protection |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between power input and ground to clamp transients above 9.0V. Use Value: Limits voltage to ≤16.9V during 37A surges, protecting LDOs, microcontrollers, and CAN transceivers. |
Use Scenario: PLC digital input modules connected to field sensors with long cable runs. IC Role / Device Role: Line-to-ground TVS on each channel to absorb inductive kickback and EFT bursts. Use Value: Withstands repeated 10/1000µs pulses up to 600W, maintaining signal integrity without degradation. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED drivers in vehicle lighting subjected to ISO 7637-2 Pulse 2b. IC Role / Device Role: Parallel-connected TVS across driver output to shunt transient energy away from MOSFETs and current sense resistors. Use Value: 3.5V forward voltage at 50A surge allows safe conduction during high-current transients without latch-up. |
Use Scenario: USB 2.0 data lines in automotive infotainment head units requiring IEC 61000-4-2 Level 4 ESD immunity. IC Role / Device Role: Bi-directional variant not applicable; SMBJ9.0 used on VBUS line only for overvoltage backup protection. Use Value: 16.9V clamping prevents VBUS overvoltage from damaging USB power switches and PMICs during hot-plug events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | Narrower VBR range (10.0–11.1V) and lower VC (15.4V at 40A); tighter tolerance improves precision clamping | Better suited for systems requiring tighter voltage margin control near 9V rails | Select SMBJ9.0A when clamping consistency outweighs cost sensitivity; same DO-214AA package and layout |
| SMAJ9.0 | Lower PPK (400W), higher VC (17.8V at 25A), and SMA package (smaller footprint, higher RθJA) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 1 or sustained load dump | Choose SMAJ9.0 only for space-constrained consumer electronics with sub-400W surge requirements |
Compared with SMBJ9.0A, the SMBJ9.0 offers broader VBR tolerance and slightly higher clamping voltage but remains compatible in layout and thermal management; versus SMAJ9.0, it delivers 50% higher surge power rating and lower thermal resistance, making it the preferred choice for automotive and industrial-grade transient immunity.
Availability
SMBJ9.0 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC I/O modules, LED driver overvoltage clamping, and USB VBUS backup protection requiring stable component supply across extended production cycles.
Supply support for SMBJ9.0 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The SMBJ series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, low clamping voltage, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of SMBJ9.0 at its rated peak pulse current?
The SMBJ9.0 has a maximum clamping voltage (VC) of 16.9 V when subjected to its rated peak pulse current of 37 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components such as microcontrollers and power management ICs in the SMBJ9.0-protected circuit.
Is SMBJ9.0 unidirectional or bidirectional, and how is polarity identified?
The SMBJ9.0 is a unidirectional TVS diode, intended for DC line-to-ground protection where forward conduction is acceptable during surge events. Polarity is marked by a cathode band on the DO-214AA package body - the banded end connects to the protected line (e.g., 12V rail), while the anode connects to ground. Bidirectional variants require "C" or "CA" suffixes (e.g., SMBJ9.0C), which SMBJ9.0 does not carry.
Does SMBJ9.0 meet automotive transient immunity standards?
Yes, SMBJ9.0 meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupled EFT/ESD), as explicitly stated in Taiwan Semiconductor's R2104 datasheet. Its 600W peak power rating and 16.9V clamping voltage enable compliance with these waveforms when properly mounted with low-inductance PCB layout.
What is the maximum junction temperature and thermal resistance of SMBJ9.0?
The SMBJ9.0 has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJC = 10°C/W (junction-to-case) and RθJA = 55°C/W (junction-to-ambient). These values allow reliable operation in under-hood automotive environments and thermally demanding industrial enclosures when mounted on copper-poured PCBs per recommended pad layout.
How does SMBJ9.0 differ from SMBJ9.0A in practical circuit design?
The SMBJ9.0A features a tighter breakdown voltage range (10.0–11.1 V vs. 10.0–12.2 V for SMBJ9.0) and lower clamping voltage (15.4 V vs. 16.9 V at rated current), offering improved voltage margin control. Both share identical DO-214AA packaging, pinout, and thermal characteristics, so SMBJ9.0A can be substituted without layout changes - but only if the narrower VBR tolerance aligns with system-level surge margin requirements for the SMBJ9.0 application.
SMBJ9.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 16.9V
- Current - Peak Pulse (10/1000µs):
- 37A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ9.0 FAQ
1.How can I place an order for SMBJ9.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9.0 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMBJ9.0 reliable?
The price and inventory of SMBJ9.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9.0 is usually 5 days.
3.What payment methods are accepted for SMBJ9.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9.0?
SMBJ9.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9.0 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMBJ9.0?
For technical support, including SMBJ9.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9.0 requirements.
6.How does Aetrix verify that SMBJ9.0 is sourced from the original manufacturer or authorized distributors?
All SMBJ9.0 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMBJ9.0 meets industry standards.
7.What is the process for return or replacement of SMBJ9.0?
All SMBJ9.0 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9.0, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMBJ9.0 part is unused and in its original packaging.
Return procedure for SMBJ9.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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